Receive the latest national-international updates in your inbox

Amazon CEO Jeff Bezos attends the premiere of "The Post " at The Newseum on Thursday, Dec. 14, 2017, in Washington.

With the $1 trillion valuation mark now behind Amazon and Apple, two more technology companies are quickly closing in on the milestone.

Microsoft and Alphabet are the next biggest companies racing to a $1 trillion market capitalization, each closing in on the mark yet still over $100 billion away. Here's what it would take to get the 10 U.S. companies behind Apple and Amazon to $1 trillion:

Wall Street expected Amazon shares to rise about 15 percent over the next year (as of Aug. 3, the day after Apple hit $1 trillion) — but it rose more than 10 percent in the past month, soaring past the milestone. Microsoft is a bit behind and will not likely surpass $1 trillion over the next 12 months, according to analysts. And while Wall Street expects Facebook to grow the most over the next year, it still has a very long way to go to reach the four comma club.

Apple is expected to cool off, with Wall Street projecting a small amount of growth for the company.